Region detection using color similarity

In this paper, we propose a method to detect a road sign from a road scene image in the daytime. In order to utilize the color feature of the sign efficiently, the color distribution of sign is examined, and then a color similarity map is constructed. Assuming that the color distribution is a normal distribution, a color similarity map is obtained. Additionally, the color similarity shown on the map is incorporated into an image function of an active net model. A road sign is extracted as if it is wrapped up in an active net. Some experimental results obtained by applying an active net to images are presented